package com.cms.common.interceptor;

import cn.hutool.core.util.StrUtil;
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.auth0.jwt.exceptions.JWTVerificationException;
import com.cms.common.Constants;
import com.cms.entity.User;
import com.cms.service.IUserService;
import com.cms.exception.ServiceException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;



public class JwtInterceptor implements HandlerInterceptor {

//    @Autowired
//    private IUserService iUserService;
//
//    @Override
//    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,Object handler){
//        String token = request.getHeader("token");
//        //如果不存在映射到方法直接跳过
//        if (!(handler instanceof HandlerMethod)){
//            return true;
//        }
//        //执行认证
//        if (StrUtil.isBlank(token)){
//            throw new ServiceException(Constants.CODE_401,"无token，请重新登录");
//        }
//        //获取 token 中的 user id
//        String userId;
//        try {
//            userId = JWT.decode(token).getAudience().get(0);
//        } catch (JWTDecodeException j){
//            throw new ServiceException(Constants.CODE_401,"token验证失败，请重新登录");
//        }
//        //根据token中的userid查询数据库
//        User user = iUserService.getById(userId);
//        if (user == null){
//            throw new ServiceException(Constants.CODE_401,"用户不存在，请重新登录");
//        }
//        //用户密码加签验证 token
//        JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256(user.getPassword())).build();
//        try {
//            jwtVerifier.verify(token);//验证token
//        }catch (JWTVerificationException e){
//            throw new ServiceException(Constants.CODE_401,"token验证失败，请重新登录");
//        }
//        return true;
//    }

}